﻿using System;
using System.Collections.Generic;

namespace ConsoleApp1
{
    internal class Program
    {
        private static void Main(string[] args)
        {
            Console.WriteLine("Hello, World!");
        }
    }

    public static class EnumerableExtensions
    {
        //一共125个字符(含public 前面的8个空格)
        public static IEnumerable<TSource> OrderByExpression<TSource>(this IEnumerable<TSource> source12345678, int a1234567)
        {
            return default;
        }
    }
}